APPLICATION OF SILICA OR BENTONITE IN CO-FLOCCULATION OF FINES AND FILLER
It is well known that the “nano/micro-particulate retention systems improves retention and drainage greatly, so nano-particle (colloidal silica) and micro-particle (bentonite) were prepared to apply with CPAM in co-flocculation of fines and filler. The comparison among no bentonite addition, addition of bentonite in handsheet former, and co-flocculation of fines and filler with CPAM and bentonite (FFPB co-flocculation process) showed that FFPB co-flocculation process had the best filler retention. Bentonite improved drainability of furnish, sheet formation and smoothness, while light scattering coefficient marginally decreased. The effect on other properties was not significant. Co-flocculation of fines and filler with CPAM and silica (FFPS co-flocculation process) increased filler retention slightly, but it increased paper apparent density and tensile index. It also decreased air permeability and light scattering coefficient and deteriorated sheet formation. The results showed that silica was more effective in fines retention compared to filler retention. More fines were retained by silica, so the drainability became deteriorated. As a result, more fibers flocculated and sheet formation deteriorated.
bentonite silica co-flocculation fines filler sheet properties
Lin Tao Yin Xuefeng Mousa M. Nazhad
Shaanxi Province Key Laboratory of Papermaking and Specialty Paper, College of Papermaking Engineeri Pulp and Paper Technology, Asian Institute of Technology, 12120, Thailand
国际会议
广州
英文
912-915
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）